Machine for retouching photographic negatives



(No Modem MACHINE FOR RETOUOHING' PHOTOGRAPHIO NEGATIVES. No. 290,217. Patented Dec. 18, 1883.

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J. DENSMORB.

MACHINE FOR RETOUOHING PHOTOGRAPHIG NEG-ATIVES. No. 290,217. Patented Dec. 18, 1888.

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JAY DENSMORE, OF NILES, MICHIGAN.

MACHINE FOR RETOUCHING PHOTOGRAPHIG NEGATIVES.

SPECIFICATION forming part of Letters Patent No. 290,217, dated December 18, 1883.

Application filed August :29, 1883. (No model.)

To (ZZZ whom it may concern.-

Be it known that I, J in DENSMORE, a cit-izen of the United States, residing at Niles, in the county of Berrien and State of Michigan, have invented a new and useful Machine for Retouching Photographic Negatives and other Similar Purposes, of which the following is a specification.

My invention relates to the attachment of a cord or string or other similar article to the retouchingpencil held in the hand of the retoueher, by means of which motion may be communicated to the point of the pencil upon a photographic negative to be retouched, which motion may be regulated at will by the retoucher, whereby much finer and more rapid work may be done upon said negative than by hand. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure I is a view of an ordinary retouching stand or frame mounted upon an ordinary sewing-machine table, showing the pencil in the hand of the retoucher with the cord or string attached. Fig. 2 is another view of the same, showing the means whereby the cord or string is operated.

Similar letters refer views.

In these views motion is communicated to the cord or string 9 by means of an ordinary sewing-machine treadle and balance-wheel; but other means of communicating such motion may be equally well applied. One end of the cord or string 9 is attached to the vibrating bar 1). One end of the barb is attached to a stationary point or pivot, m, and the other end of it to the mechanism for communicating vibratory motion to it. The end of the cord or string 9 that is attached to the bar 6 is so arranged that it can be moved along the bar I) nearer to or farther from the point or pivot m, as may be desired. The cord 9 is attached to the pencil (Z by means of the loop Z. The loop Z is made of metal, with a hole in each end, through which the cord g passes loosely and freely. The tension upon the cord 9 when in use is made sufficiently strong by the weight w to prevent the pencil (Z from slipping upon to similar parts in both the cord by its vibrations when the machine is running, but not so strong to prevent the pencil (Z being readily turned around or moved up or down upon the cord r by "the hand of the retoucher, as may be desired. The cord 9 passes from the bar Z2 up through the eye it in the upper part of the retouching stand, then downward through each end of the loop Z, through the eye a and to the hole It in the table, the other end of it being attached to the weight w. The section a of the cord gis composed of some elastic substance, so as to allow the part of the cord 9 that is attached to the pencil d to vibrate freely without disturbing the requisite tension of the cord or the weight a". The proper degree of tension upon the cord 9 when in use is regulated and maintained by the weight w. The eye a is attached to the ring 5, which slides firmly upon the rod 1, and by means of which the direction of that part of the cord 9 that is attached to the pencil (Z may be regulated to suit the position of the hand of the retoucher as it holds the point of the pencil (Z in place upon the negative 0. A ring is put upon the pencil (Z at the point of attachment of the cord g, to prevent the cord 9 from slipping out of place when in use. For very fine effects, the end oi'the cord g upon the bar I) is moved near the point or pivot m, and for coarser effects farther away from it.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a retouching-machine, the loop Z, in combination with the pencil d and the cord or string 9, substantially as described.

2. In a retouching-machine, the elastic section a in the cord or string g, in combination with a retouching-pencil, substantially as dcscribed.

3. In a retouching machine, the combination and arrangement, with the cord or string 9, of the bar I), the eye h, the loop Z, the eyen, the ring 8, the rod 9*, and the weight a, substantially as described.

JAY DEJSMORE.

\Vitnesses:

HENRY M. DEAN, J OHN W. J OHNSTON. 

